JP2007095212A - Magnetic head device and disk recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic head device which surely discharges the static electricity of a magneto-optical disk or a magnetic disk and prevents the generation of noise, and a disk storage device. <P>SOLUTION: A slide member 3 with a built-in magnetic head 2 to be in direct contact with the magneto-optical disk 9 is formed of a conductive material, The slide member 3 is electrically connected to a circuit board 11 having ground potential through a metal thin plate 4 and a flexible substrate 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a magnetic head device used for writing a recording signal to a magneto-optical disk or a magnetic disk, and a disk recording apparatus for writing a recording signal to the magneto-optical disk or the magnetic disk.

  The magneto-optical disk recording apparatus stores information by applying a magnetic force corresponding to a recording signal to a magneto-optical disk using a magnetic material as a recording medium.

  Specifically, first, the magneto-optical disk recording apparatus irradiates the magneto-optical disk with a laser. As a result, the temperature of the irradiated portion of the magneto-optical disk is locally increased, and the magnetic holding force of the irradiated portion is reduced. Then, by applying a magnetic field corresponding to the recording signal to the magneto-optical disk, the recording signal is recorded on the magneto-optical disk.

  In the magneto-optical disk recording apparatus, information can be reproduced by irradiating the magneto-optical disk with a laser whose output is weaker than that at the time of recording.

  As described above, in order for the magneto-optical disk recording apparatus to store information on the magneto-optical disk, the magneto-optical disk recording apparatus needs to apply a sufficient magnetic field to the magneto-optical disk. For this reason, the magneto-optical disk recording apparatus is configured to slide a sliding member having a magnetic head for applying a magnetic field to the magneto-optical disk in direct contact with the surface of the magneto-optical disk.

  The magnetic head for applying a magnetic field to the magneto-optical disk is composed of a coil formed by winding a conductive wire around a core provided inside the sliding member formed in a box shape with resin. Yes.

  However, while the magneto-optical disk recording apparatus is recording information on the magneto-optical disk, the magnetic head is in contact with the magneto-optical disk, or by friction with air due to rotation of the magneto-optical disk, etc. Static electricity is charged on the magneto-optical disk. For this reason, dust in the air adheres to the surface of the magneto-optical disk. As a result, when the magneto-optical disk recording apparatus records or reproduces information, writing or reading of information by a laser is hindered, and the recording / reproducing quality of the magneto-optical disk recording apparatus is deteriorated.

Therefore, Patent Document 1 discloses a technique for solving the above problem. Specifically, in Patent Document 1, a conductive discharge electrode is attached to a support member having a magnetic head, one end of the discharge electrode is connected to the ground potential, and the other end is connected to the label surface of the magneto-optical disk. It is configured to discharge static electricity charged on the magneto-optical disk by bringing it into contact.
Japanese Patent Laid-Open No. 11-203742 (Released on July 30, 1999)

  In the conventional configuration, when the magnetic head is moved to a position in contact with the magneto-optical disk in order to store information on the magneto-optical disk, the discharge electrode provided on the magneto-optical disk side from the magnetic head. One end of the magnetic disk contacts the magneto-optical disk before the magnetic head. As a result, the magneto-optical disk recording apparatus discharges static electricity charged on the magneto-optical disk. However, the discharge electrode is provided in the magnetic head device as a separate member for discharge. Therefore, when one end of the discharge electrode comes into contact with the magneto-optical disk, depending on the positional relationship or resistance value between the one end of the discharge electrode and the magneto-optical disk, the discharge electrode and the magneto-optical disk are surely connected. Contact may not be made. As a result, the conventional magneto-optical disk recording apparatus may not be able to reliably discharge static electricity charged on the magneto-optical disk.

  In addition to the above problems, the magneto-optical disk recording apparatus having the conventional configuration, when recording information on the magneto-optical disk, controls the magnetic field for recording information generated on the magnetic head and the magnetic head. The control current affects the recording signal other than the portion that performs magnetic field modulation on the magneto-optical disk as noise. As a result, the recording quality of the magneto-optical disk recording apparatus is degraded.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a magnetic head device and a disk recording apparatus that reliably discharge static electricity from a magneto-optical disk or a magnetic disk and prevent noise generation. There is to do.

  In order to solve the above-described problems, a magnetic head device according to the present invention is a magnetic head device provided in a magneto-optical disk or a disk recording apparatus that performs recording on a magnetic disk. Magnetic disk or magnetic head to be applied to magnetic disk, sliding member containing the magnetic head and formed of a conductive material, and discharge for electrically connecting the sliding member to a grounding member of the disk recording device And a member.

  According to the above configuration, in the magnetic head device according to the present invention, the magneto-optical disk or the magnetic head for applying a magnetic field to the magnetic disk is built in the sliding member made of a conductive material. The sliding member is electrically connected to the ground member by the discharge member. In this way, by electrically connecting the sliding member to the grounding member, the grounding member is electrically connected to the magneto-optical disk or the magnetic disk via the sliding member formed by a conductive material. To be released. The sliding member is an indispensable member constituting the magnetic head device, and is completely in contact with the magneto-optical disk or the magnetic disk at the time of recording. As a result, the magnetic head device according to the present invention can reliably discharge the static electricity of the magneto-optical disk or the magnetic disk and prevent the adhesion of dust or the like to the magneto-optical disk or the magnetic disk.

  The sliding member is made of a conductive material and grounded so that a magnetic field for recording information generated in the magnetic head and a control current for controlling the magnetic head are supplied to the magneto-optical disk or It is possible to prevent the recording signal other than the portion that performs magnetic field modulation on the magnetic disk from being affected as noise, and recording onto the magneto-optical disk or the magnetic disk is possible without degrading the recording quality.

  In the magnetic head device according to the present invention, the sliding member may be made of a conductive resin.

  According to the above configuration, the sliding member is in sliding contact with the magneto-optical disk or the magnetic disk with low frictional resistance due to its own slipperiness. Therefore, static electricity generated between the sliding member and the magneto-optical disk or the magnetic disk can be minimized.

  In the magnetic head device according to the present invention, a flexible substrate may be used for at least a part of the discharge member.

  According to the above configuration, the flexible substrate can be used as a member for connecting the magnetic head and the control circuit and a part of the discharge member. Therefore, the magnetic head device according to the present invention can discharge static electricity charged on the magneto-optical disk or the magnetic disk to the ground member without adding a special member for grounding.

  In addition, a disk recording apparatus according to the present invention includes a magnetic head device having any one of the above-described features.

  With the above configuration, it is possible to provide a disk recording apparatus characterized by a magnetic head.

  As described above, the magnetic head device according to the present invention is a magnetic head device provided in a magneto-optical disk or a disk recording apparatus that performs recording on a magnetic disk, and applies a magnetic field corresponding to a recording signal to the magneto-optical disk. Or a magnetic head to be applied to the magnetic disk, a sliding member that is built in the magnetic head and is formed of a conductive material, and a discharging member that electrically connects the sliding member to a grounding member of the disk recording device. It is characterized by having.

  Therefore, it is possible to provide a magnetic head device and a disk storage device that reliably discharges static electricity from the magneto-optical disk or the magnetic disk and prevents noise.

  An embodiment of the present invention will be described below with reference to FIGS.

[Overall configuration of magneto-optical disk recording apparatus]
FIG. 1 is a side sectional view showing an overall configuration of a magneto-optical disk recording apparatus (disk recording apparatus) 1 according to the present embodiment. FIG. 2 is a top view showing the overall configuration of the magneto-optical disk recording apparatus 1.

  As shown in FIG. 1, the magneto-optical disk recording apparatus 1 according to the present embodiment includes a chassis 10, a turntable 14, a magnetic head device 7, and a connector 8 on a circuit board (grounding member) 11. The optical pickup device 13 having the objective lens 12 in the chassis 10 and the spin motor 15 are provided.

  Examples of the magneto-optical disk 9 recorded and reproduced by the magneto-optical disk recording apparatus 1 include MD and MO.

  In the magneto-optical disk recording apparatus 1, a rectangular parallelepiped chassis 10 that serves as a base of the magneto-optical disk recording apparatus 1 is provided on a circuit board 11 with an opening surface facing the circuit board 11. A spin motor 15 that rotates the turntable 14 is provided on the inner upper surface of the chassis 10. A turntable 14 is provided on the outer upper surface of the chassis 10 at a position corresponding to the spin motor 15. The center plate of the magneto-optical disk 9 is attracted and held on the turntable 14.

  Further, an optical pickup device 13 having the magnetic head device 7 on the upper surface is provided on the side surface of the chassis 10 that is open. The optical pickup device 13 is arranged inside the chassis 10 and the magnetic head device 7 is arranged outside the chassis 10. With the above configuration, a laser can be irradiated from the information recording surface side of the magneto-optical disk 9 by the optical pickup device 13, and a magnetic field can be applied from the label surface side of the magneto-optical disk 9 by the magnetic head device 7.

  The magnetic head device 7 is connected to the circuit board 11 via the connector 8 at one end opposite to the end in contact with the magneto-optical disk 9.

  The magnetic head device 7 is provided on the side opposite to the optical pickup device 13 with respect to the magneto-optical disk 9, and the magnetic head device 7 and the optical pickup device 13 are synchronized in the radial direction of the magneto-optical disk 9. Moving.

  The magneto-optical disk 9 is provided inside a disk cartridge 18 as shown in FIG. The disk cartridge 18 has openings 16a and 16b formed on both upper and lower surfaces thereof, and includes a shutter 17 that slides sideways to cover the openings 16a and 16b.

  The shutter 17 is provided to protect the recording layer of the magneto-optical disk 9 when recording / reproduction of the magneto-optical disk 9 is not performed.

[Configuration of magnetic head device]
Hereinafter, the configuration of the magnetic head device 7 which is a characteristic part of the present invention will be specifically described. The magnetic head device 7 includes a magnetic head 2, a sliding member 3, a metal thin plate (discharge member) 4, and a flexible substrate (discharge member) 5.

  In this embodiment, the magnetic head device 7 is used in a magneto-optical disk recording device, but the present invention can also be applied to a magnetic disk recording device.

  The magnetic head 2 is built in a sliding member 3 made of a conductive resin formed in a box shape, and is formed by winding a coil around a core standing up in the sliding member 3. The thin metal plate 4 is a member that supports the magnetic head 2 and the sliding member 3, and is movable up and down with respect to the magneto-optical disk 9 with the rotation support portion 19 as a rotation center. The metal thin plate 4 and the sliding member 3 are electrically connected. The flexible substrate 5 connects the magnetic head 2 and the thin metal plate 4 to a connector 8 on the circuit substrate 11.

  That is, the magnetic head device 7 according to the present embodiment has a so-called overwrite in which the metal thin plate 4 supporting the magnetic head 2 and the sliding member 3 is movable in the vertical direction with respect to the magneto-optical disk 9 by the rotation support portion 19. A head type magnetic head device is configured. When writing to the magneto-optical disk 9, the sliding member 3 is brought into sliding contact with the surface of the magneto-optical disk 9 to keep the magnetic head 2 at a position close to the surface of the magneto-optical disk 9. A sufficient external magnetic field can be applied.

  For example, when the magneto-optical disk recording apparatus 1 is not operating or when the magneto-optical disk recording apparatus 1 reproduces information recorded on the magneto-optical disk 9, the rotation support unit 19 uses the metal thin plate 4. The sliding member 3 is supported at a standby position where it does not contact the magneto-optical disk 9. When the magneto-optical disk recording apparatus 1 records a recording signal on the magneto-optical disk 9, the rotation support unit 19 moves the metal thin plate 4 at the operating position where the sliding member 3 directly contacts the magneto-optical disk 9. To support.

  The magnetic head 2 applies a magnetic field corresponding to the recording signal to the magneto-optical disk 9 by flowing a current corresponding to the recording signal through the coil.

  The sliding member 3 is made of a conductive resin and is in direct contact with the label surface of the magneto-optical disk 9. In this embodiment, as for the conductive resin which comprises the sliding member 3, resin itself has electroconductivity. In the present embodiment, the sliding member 3 uses a conductive resin, but may be any material having conductivity and low frictional resistance.

  The flexible substrate 5 is a flexible substrate for electrically connecting the metal thin plate 4 and the circuit board 11. On the flexible substrate 5, three wires are provided in parallel with the longitudinal direction of the substrate. The flexible board 5 and the wiring are connected to the circuit board 11 via the connector 8.

  Two of the wirings provided on the flexible substrate 5 are connected at one end (circuit board 11 side) to a control circuit provided on the circuit board 11 via the connector 8. The other end of the wiring (on the magneto-optical disk 9 side) is connected to a coil wound around the core of the magnetic head 2 built in the sliding member 3. The control circuit controls the operations of the magnetic head device 7 and the optical pickup device 13 in accordance with the recording signal.

  The other wiring provided on the flexible substrate 5 has one end (circuit board 11 side) via the connector 8 and a grounding portion (not shown) having a ground potential provided on the circuit board 11. Connected to. The other end of the wiring (on the magneto-optical disk 9 side) is connected to the metal thin plate 4. The wiring and the metal thin plate 4 are connected by soldering the connection terminal 6, which is the other end of the wiring, onto the metal thin plate 4, screwing, and crimping connection.

  Thus, in this embodiment, the flexible substrate 5 for electrically connecting the thin metal plate 4 and the circuit board 11 is used in combination with a member for connecting the magnetic head 2 and the control circuit. For this reason, it is possible to discharge the static electricity charged in the magneto-optical disk 9 to the circuit board 11 without adding any special parts.

  In the present invention, the grounding member is not limited to the circuit board 11 and may be another grounding member, for example, the chassis 10.

  In the present invention, the member for electrically connecting the metal thin plate 4 and the circuit board 11 is not limited to the configuration used in combination with the member for connecting the magnetic head 2 and the control circuit. That is, the flexible substrate 5 and the member for connecting the magnetic head 2 and the control circuit may be provided separately.

  As described above, by electrically connecting the sliding member 3 to the circuit board 11, static electricity generated by friction between the sliding member 3 and the magneto-optical disk 9 or friction with air due to rotation of the magneto-optical disk 9 is generated. Then, it is discharged to the circuit board 11 through the sliding member 3 formed of conductive resin. The sliding member 3 is an essential member constituting the magnetic head device 7 and is completely in contact with the magneto-optical disk 9 during recording. As a result, the magnetic head device 7 reliably discharges the static electricity of the magneto-optical disk 9. As a result, the magneto-optical disk recording apparatus 1 according to the present embodiment can prevent dust and the like from adhering to the magneto-optical disk 9.

  Further, when the sliding member 3 is made of a conductive resin and grounded, a magnetic field for recording information generated in the magnetic head 2 and a control current for controlling the magnetic head 2 are generated by the light. It is possible to prevent the recording signal other than the portion that performs magnetic field modulation on the magnetic disk 9 from being affected as noise. That is, the sliding member 3 can act as a shield for the magnetic head 2. As a result, the magneto-optical disk recording apparatus 1 according to the present embodiment can perform recording on the magneto-optical disk 9 without degrading quality.

  In the magneto-optical disk recording apparatus 1 according to the present invention, the sliding member 3 may be made of a conductive material, but in this embodiment, the sliding member 3 is made of resin. With the above configuration, the sliding member 3 is in sliding contact with the magneto-optical disk 9 with low frictional resistance due to its own slipperiness. Therefore, static electricity generated between the sliding member 3 and the magneto-optical disk 9 can be minimized.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

  The present invention can be suitably used for a magneto-optical disk recording apparatus that stores information on a magneto-optical disk.

1 is a side sectional view of a magneto-optical disk recording apparatus according to the present invention. 1 is a top view of a magneto-optical disk recording apparatus according to the present invention.

Explanation of symbols

1 Magneto-optical disk recording device (disk recording device)
2 Magnetic head 3 Sliding member 4 Metal thin plate (discharge member)
5 Flexible substrate (discharge member)
6 Connection terminal 7 Magnetic head device 9 Magneto-optical disk 11 Circuit board (grounding member)
19 Rotation support

Claims (4)

A magnetic head device provided in a magneto-optical disk or a disk recording apparatus for recording on a magnetic disk,
A magnetic head for applying a magnetic field corresponding to a recording signal to a magneto-optical disk or a magnetic disk;
A sliding member containing the magnetic head and formed of a conductive material;
A magnetic head device comprising: a discharging member for electrically connecting the sliding member to a grounding member of a disk recording device.   2. The magnetic head device according to claim 1, wherein the sliding member is made of a conductive resin.   2. The magnetic head device according to claim 1, wherein a flexible substrate is used for at least a part of the discharge member. A disk recording apparatus that performs recording on a magneto-optical disk or a magnetic disk, comprising the magnetic head device according to claim 1.

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